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UltraFire BRC 18650 2600mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery - Boxed

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Ultrafire 18650 2600mah Protected Rechargeable Lithium Battery

The Ultrafire 18650 2600mah Protected cell features a button top making it particularly compatible with many flashlight applications.

Rechargeable Lithium batteries are rapidly becoming a very economical way to lower the operating costs of Lithium-Powered flashlights. We offer a number of different options in order to meet any rechargeable needs. These are Protected batteries.

These fully protected cells simplify usage with their integrated PCB. Perfect for your single cell application these cells are not for pack building as doing so will defeat the PCB protection which is matched to the correct voltage on a single cell. If you are building a pack please choose one of our other cells and the appropriate PCB.

Features and Benefits:

  • With integrated PCB Protection!
  • Lithium Ion 18650 cylindrical rechargeable batteries
  • Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V.
  • Unique PCB design and patent pending.
  • Higher energy density and lower weight than other types rechargeable batteries
  • Manufactured under ISO9001-2000 to assure quality
  • Battery tested based on International Electrotechnical Commission (IEC) standard to ensure capacity, quality and life time
  • Lighting or other device needing 3.7V power
  • Building portable power device needing high energy density and low weight

Product Specifications:

  • Capacity: Nominal&: 2600 mAh, Minimum: 2400 mAh
  • Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V.  UNIQUE INTERNAL PCB!
  • Dimensions:
    • Diameter 18.8+/-0.5 mm
    • Height 68.7+/- 0.5mm
  • Weight (Typical) Approx. 46 g
  • Voltage: 3.7V (also called 3.6V and 4.2V)
  • Cut-off Voltage: 2.5V
  • Internal Impedance: less or equal to 180  milliohm (with PTC)
  • Cycle Performance: 90% of initial capacity at 400 cycles
  • Cycle life: > 500 cycles
  • Charge: Current = 0.5C Voltage = 4.2 V End Current = 0.01 mA
  • Discharge: Current = 0.5C End Voltage = 3.0V

* Note: These higher capacity cells have a larger diameter than standard 18650's and may not fit all flashlights. Please verify dimension of flashlight or device. May not fit most Fenix flashlights.

Battery Size:18650
Battery Capacity (mAh):2600
Battery Chemistry:Li-Ion
Battery Voltage:3.7
Battery Terminal Type:Button Top
Battery Shelf Life:3 Years
Warranty:Battery Junction 30-Day Warranty
Return Policy:Battery Junction Return Policy
Product Weight:1.623oz
Product Dimensions:2.705" (L) x 0.74" (Diameter)
Country of Origin:CN
Associated Battery Sizes:168A, 18650, 19670, Protected 18650, Unprotected 18650
21 Reviews
76% (16)
19% (4)
0% (0)
5% (1)
0% (0)
By Dave
Great Economical 18650
January 15, 2018
This is a great economical 18650, power factor not the highest but accurate.
ConsHigher power batteries are available at a higher price. Not intended for hi drain devices.
By Dave
Slatington, Pa
June 15, 2017
By Jacob
Bedford, OH
Good Battieries...
March 20, 2017
Got 6 of them, so 3 in the G30 and 3 extra to swap out when the others need to be charged up. Would buy some more, if it wasn't for the length, which is why I only gave 4 stars of them (plus haven't had them that long) .
ProsThey last longer than my other 18650 and power the G30 great.
ConsWith the button and I'm guessing the protection circuit, they are longer than regular 18650's, so they will not fit in every thing.
By Glen
Greenville, RI
Great value
September 17, 2016
Powerful battery, Keeps a charge
ProsPowerful, great value,
By Desertratgreg
Mohave, Az
Long lasting !
February 6, 2016
Bought 4 of these when I purchased my 900 lumen flashlight about 4 years ago. The factory supplied batteries are dead as well as some other after market batteries I purchased only 2 years ago.
I use my light in all kinds of activities including construction and automotive work, 4-wheeling, boating and camping.
These batteries hold a charge well and are much more rugged than many other brands available.
3 Questions & 3 Answers
from Phoenix, AZ asked:
July 24, 2015
Will it fit into a Fenix TK75?
1 Answer
Yes, these will fit in the TK75.
Submitted by: Customer Service on July 27, 2015

Frank Angelica
from Louisiana asked:
December 29, 2014
What is a PCB integrated protection system?
1 Answer
PCB provides added protection against over discharge and other potentially dangerous conditions.
Submitted by: Customer Service on December 29, 2014

jeff tyson
from newport rhode island asked:
April 2, 2014
does the ultrafire 18650 xsl 2600mah fit in the terralux tt-4 ?
1 Answer
Yes, the TT-4 will take the Ultrafire 18650. The TT-4 will work with any 18650 Li-Ion battery.
Submitted by: Customer Service on April 2, 2014

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